Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Holographic digital watermark










Image Number 5 for United States Patent #7551750.

A digital watermark which is incorporated, perceptibly or imperceptibly, into a diffractive device such as a hologram. When applied to protect and/or authenticate a document of value or a product, the device provides an increased degree of overt and covert security, and permits tracking of the sale, use or other parameters associated with the product and/or document of value.








 
 
  Recently Added Patents
Servomotor control circuit
Launch cable case
Mobile terminal device capable of more effectively utilizing operation portions, conductive portion, operation detecting unit, power supply unit, and signal processing unit
Processing data using information embedded in a data request
Air scent dispenser
Image forming apparatus capable of timely starting different image formation mode
Surface-emitting laser light source using two-dimensional photonic crystal
  Randomly Featured Patents
Reagent package
Contact bodies for liquid and gas
Means and methods of reclaiming and processing biodegradable waste into poultry products and humus-like substances
Knock-down reusable column form
Slew rate control for driver circuit
Thermal assisted head using curved wave guide
High capacity card and reader system
Toy vehicle having articulated wheel portions
Safety trocar assembly
Apparatus for setting a workpiece on a zipper sewing machine